—I’m leaving now.
— you turn off the lights and the puter.
A. To make sure
B. Make sure
C. Made sure
D. Making sure
网友回答
A. To make sure
(答案→)B. Make sure
C. Made sure
D. Making sure
解析：考查祈使句的用法。句意是：确保你关了灯和电脑。这是一个祈使句，空后面的内容是Make sure的宾语从句；祈使句省略主语you，以动词原形开头。